Carburetor vaporizer



Aug. 26, 1924. 1,506,148

v. c. ANDERSON CARBURETOR VAPORI ZER Filed July 21. 1923 P ITT ITTI H. 11k 4/? LL U 1 y 4 0 Z} za 38 n w: Z4 37 33 J2 Patented Aug. 26, 1924.

UNITED STATES PATENT OFFICE.

VIRGIL CHARLIE ANDERSON, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR- OF ONE- HALF TO CHARLES T. H. WRIGHT, OF SAN FRANCISCO, CALIFORNIA.

CARBURETOR VAPORIZER.

Application filed July 21, 1923.

To (/77 whom it may concern:

lie it known that I. Vinon, ANnicusox. a citizen of the. United States of America. residing at San Francisco. in the county of San Francisco and State of California, have invented certain new and useful Improvements in (arburetor Vaporizers. of which the following is a specification.

This invention relates to a carburetor vaporizer for use with internal combustion engines. wherein provision is made for delivering the fuel umler suction in a thin film-like stream while being subject to a heating action. with the flow control regulated entirel by the suction.

Another object of the invention is the provision of an air valve serving for the. admission of air during operation of the engine under other than idling speed thi air valve being gravity closed and opened solely by the suction of the engine.

A further object of the invention is the provision of a manually controlled low speed or idling air inlet. arranged to deliver the air in a mixing chamber to insure a proper mixture for idling speeds.

A further object is the provision of a fuel feed control operated by gravity and aranged to insure an opening movement in proportion to and corresponding accurately with the suction of the engine.

The invention is illustrated in the accompanying drawings. in which:

Fig. l is a vertical sectional view of the. improved carburetor vaporizer. showing the same connected to the intake manifold.

Fig. 2 is a section on line Q -Qot' Fig. l, the air valve being omitted.

The improved carburetor vaporizer ineludes a casing 1. formed at the lower end with an inwardly projecting annular flange 2. formed on its upper surface near the inner edge to provide a valve seat the lower edge of this flange being inwardly and upwardlv curved to form in effect an air inlet 4. A fuel tube 5 is arranged centrally of the casing 1, being supported at the lower end by integral laterally projecting strips 6. which are terminally secured to the lower surface of the flange 2. as by bolts T. These strips 6 are arranged in (litlli'itil'it'zlllV opposed pairs, and thus provide a material opening between the strips serving to admit air at the bottom of the carburetor vaporizer.

Serial No. 653,043.

This air inlet will be hereinafter termed the high speed air inlet. The fueltube extends below the supporting strips 6 as a tubular section 8. the bore of which is enlarged at the lower end to provide a shoulder 9. Arranged in the fuel tube 5 is a heating element 1o preferably in the form of a hollow cylinder having its lower end bent laterally to provide a flange 11 to bear against the. shoulder 9, a locking ring 12 threaded within the lower end of the tubular section 8 securing the heating element in place. The heating element extends lengthwise the fuel tube 5 and is of slightly less diameter than the interior of said tube. thereby defining a narrow annular fuel channel 12', about the heating element, which the fuel must traverse in its flow toward the engine. i\n insulating plug 14 is secured in the lower end of the heating element 10. being preferably threaded within the locking rin 12. To this plug 14 is secured a wire or like member 15 arranged to be connected by a binding post 16 or the like secured to the plug 14. to a source of electric energy. so that the wire 15 may become heated and thereby heat the element 10 for directing said heat to the thin film of fuel flowing by such element.

The fuel is admitted through a pipe 17 leading into the fuel channel 13 immediately above the lower end of the heating element. and this pipe 17 may, if desired, be interrupted by an auxiliary or preliminary heating element in the form of an insulated cylindrical block 18 arranged transverse the pipe l7. preferably in a cylindrical transverse enlargement of said pipe, which enlargement is open at one end to receive a plug 19, from which the heating wire 20 projects and is coiled about the block 18. the plug 19 having the usual binding post connector 21 for the service conductor.

It is to be understood that the preliminary heater may or may not be used for the pre liminary heating of the fuel, and if used. the incoming fuel is caused to flow about the block 18 before reaching the fuel channel 13. and is preliminarily heated to thereby render its vaporization more complete in the fuel channel under some circumstances of fuel use. Ordinarily. the main heater 15 is sul'licient for the vaporization of the fuel, but under extreme weather conditions, or the r or passage 23 being formed with a diver-.

gent or inverted cone-shaped outlet 2 1. A conical valve ground .to accurately fit the conical outlet 24 is loosely seated in said outlet, so that in its lowered position the flow through the fuel assage 23 is cut oil. A ball 26 having a iameter slightly less than the maximum diameter of the outlet 24;, is arranged to seat upon an upstanding projection 27 from the fuel valve 25, a cage 28 secured to the jet block 22 aided by a light spring 29, carried by the cage, and bearing on the ball 26, serving to prevent undue displacement'of the ball when the fuel valve 25 is open under the suction of the engine. The fuel passage 23 is manually cont-rolled by a cut -ofi' 30 mounted in and operative externally of the walls of the casingl. A high speed air inlet, heretofore described as formed by the opening between the strips 6 and within the flange 2, is controlled by a welght valve 31 slidably mounted upon the fuel tube 5 and havin its under surface formed to coo erate wit the valve edge 3 of the flange 2. nder those speeds of the engine induc-' ing suflicient suction in the interior of the casing 1, the high speed air valve 31 is elevated from its seat proportionate to such suction, to admit the necessary quantity of air. There is also provided a low speed air inlet, or what may be termed the idling speed air inlet. This comprises a tubular member 32, having a flaring inlet 33, and supported in a threaded opening 34 in the casing 1, this low speed air inlet leading directly to and passing through an opening 35 in the jet block 22 so as to deliver the air through this low speed air inletdirectly to the fuel as it passes the valve 25. This low speed air inlet is manually controlled by a cut-off 36. A pressure relief valve 37 is mounted in an outlet 38 from the casing 1, this valve opening outwardly and being normally held closed by a spring 39. Valve 37 affords relief from internal pressure in the event of a back fire.

The casing 1 may, and preferably is, attached to the section 40, which in turn is connected to the intake manifold 41, the section 40 containing the usual throttle valve 42.

The space immediately above the fuel valve 25 constitutes a mixi chamber, the fuel passing freely through the cage 28 and being directed and diverted by the valve and overlying ball into a thin stream, which is taken up by the air rising directly through the high speed air inlet.' An intimate mixture is thus secured in a comparatively short length of mixing chamber.

The fuel prior to reaching the control valve 25, is adapted to travel as a thin annu'lar stream lengthwise the heating element 10, and as the latter is heated by the electric current as described, it will be apparent that the fuel is substantially vaporized before it reaches the fuel passage 23. The, suction of the engine therefore controls the fuel valve 25 and also the high speed air inlet valve 31, and, with the respective inlets proportionately arranged, it is apparent that a unimixture will be maintained at all times Without regard to the quantity of such mixture used by the engine in operation.

Claims: 1. A carburetor vaporizer for internal combustion engines, comprising a casing having a fuel tube therein, a cylindrical form and substantially constant-proportion heating element arranged within and spaced from the, interior of the fuel tube todefine a narrow fuel channel lengthwise said tube, means for heating said element, a fuel jet passage arranged at theend of the fuel tube a gravity operated valve for controlling said passage, and means bearing on said valve and serving as a fuel spreader beyond the valve.

2. A carburetor vaporizer for internal combustion engines, comprising a casing having a fuel tube therein, a cylindrical heating element arranged within and spaced from the interior of the fuel tube to define a narrow fuel channel lengthwise said tube, means for heating said element, a fuel jet passage arranged at the end of the fuel tube, a gravity operated valve for controlling said passage, and a ball to bear upon said valve to assist in seating the same, said ball acting as a fuel spreader beyond the valve.

3. A carburetor vaporizer for internal combustion engines, comprising a casing having a fuel tube therein, a cylindrical heating element arranged within and spaced from the interior of the fuel tube to define a narrow fuel channel lengthwise said tube, means for heating said element, a fuel jet passage arranged at the end of the fuel tube, a gravity operated valve for controlling said passage, and a gravity valve controlled air inlet at the lower end of the fuel tube.

4. A carburetor vaporizer for internal combustion engines, comprising a casing formed with an air inlet at the open end, a fuel tube extending vertically and centrally of the casing, an air valve slidably mounted on the fuel tube and controlling said air inlet, a fuel passage at the upper end of the fuel tube, gravity operated means for controlling said fuel passage, means arranged above the fuel passage for compelling a divergent course of the fuel, and means for delivering air directly into the fuel in this divergent path.

5. carburetor vaporizer, comprising a casing having an air inlet at the lower end, a fuel tube arranged in the casing, a gravity operated valve slidably mounted on the fuel tube to control said air inlet, a jet block secured to the upper end of the fuel tube, a heating element arranged within the fuel tube and extending ad acent the jet block, the fuel passage throu h the jet block being upwardly divergent t roughout the upper portion thereof, a conical valve seated in said divergent passage and controlling the fuel passage through the jet block, and a ball having a diameter corresponding to the maximum diameter of the divergent fuel passage and restingupon the valve.

6. A carburetor vaporizer, comprising a casing having an air inlet at the lowerend, a fuel tube arranged in the casing, a gravity operated valve shdably mounted on the fuel tube to control said air inlet, a jet block secured to the upper end of the fuel tube, a heating element arranged within the fuel tube and extending ad'acent the jet block, the fuel passage throu h the jet block being upwardly divergent t roughout the upper portion thereof, a conical valve seated in said divergent passage and controlling the fuel passage through the jet block, a ball having a diameter corresponding to the maximum diameter of the divergent fuel passage and resting upon the valve, and a cage carried by the jet block and limiting the play of the ball.

7. A carburetor vaporizer for internal combustion engines, comprising a casing having a fuel tube therein, open at the upper end, a cylindrical heating element arranged within and spaced from the interior of the fuel tube to define a narrow fuel-channel lengthwise said tube, means for heating said element,'a fuel jet block removably secured in the open end of the fuel tube and formed with a fuel passage, a gravity operated valve for controlling said passage, a fuel spreading ball seating on said valve, a fuel pipe leadin from a source of supply to said fuel chann l, and a preliminary fuel heater arranged in said pipe beyond the casing.

In testimony whereof I aflix my signature.

VIRGIL CHARLIE ANDERSON. 

